Granted Patent
Utility
US 4,973,810 · App. 07/375,568
Microwave method of popping popcorn and package therefor
Inventor:
Arne H. Brauner
Patented Case
View Patent ↗
Granted: Nov 27, 1990
Filed: Jul 3, 1989
Inventor
Arne H. Brauner
Assignee (at issue)
General Mills, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.